The spark plug ignites the mix in the combustion chamber It has to transmit the high voltage signal properly, so that the spark power is ensured (up to 40,000 Volts). It has to resist pressure (up to 50 bars), heat (up to 3,000°C) and corrosion generated inside the chamber. It has to dissipate heat to work in a correct temperature range. 68 part numbers covers 90% of the European car range, with the conventional and new technologies: Copper, Nickel, Yttrium and Platinum. Valeo delivers a comprehensive selection: one application, one choice and high-quality products (O.E. qualification & manufacturing processes).